You know how when you were young and you got up from your seat only to return to find someone sitting in it? And when you said 'Hey that's my seat' they would always say (in that annoying voice) 'I didn't see your name on it.' Well I guess Porter was afraid someone was going to do that with his piano because I noticed he has taken great care to carve his name into the side of the piano. This reminds me of when I was growing up and my parents bought a piece of furniture (a cabinet) at a scratch and dent store. Sound innocent enough but they got it cheep because some hooligan had carved the mother of all curse words into the wood, but did that deter my parents? NO, they just got out their spare key and with a few quick strokes changed "that word" into "Porter". Pretty clever if you ask me.